
import { DirectiveOptions,DirectiveFunction} from 'vue';
import {DirectiveBinding} from 'vue/types/options';
import {VNode} from 'vue';

let bind_waves:DirectiveFunction = function(el:HTMLElement, binding:DirectiveBinding,  vnode: VNode,
  oldVnode: VNode) {
  el.addEventListener('click', (e:any) => {
    const customOpts = Object.assign({}, binding.value)
    const opts = Object.assign({
      ele: el, // 波纹作用元素
      type: 'hit', // hit点击位置扩散center中心点扩展
      color: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
    }, customOpts)
    const target = opts.ele
    if (target) {
      target.style.position = 'relative'
      target.style.overflow = 'hidden'
      const rect = target.getBoundingClientRect()
      let ripple = target.querySelector('.waves-ripple')
      if (!ripple) {
        ripple = document.createElement('span')
        ripple.className = 'waves-ripple'
        ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px'
        target.appendChild(ripple)
      } else {
        ripple.className = 'waves-ripple'
      }
      switch (opts.type) {
        case 'center':
          ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + 'px'
          ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + 'px'
          break
        default:
          ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop) + 'px'
          ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft) + 'px'
      }
      ripple.style.backgroundColor = opts.color
      ripple.className = 'waves-ripple z-active'
      return false
    }
  }, false)
}
export default bind_waves;